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httpd: fix handling of EOF in get_line()

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2019-04-16 11:07:37 +02:00
parent ff36bec49b
commit d0ae4103dd
1 changed files with 10 additions and 8 deletions
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18
networking/httpd.c
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@ -1194,7 +1194,8 @@ static void send_headers_and_exit(int responseNum)
}
/*
* Read from the socket until '\n' or EOF. '\r' chars are removed.
* Read from the socket until '\n' or EOF.
* '\r' chars are removed.
* '\n' is replaced with NUL.
* Return number of characters read or 0 if nothing is read
* ('\r' and '\n' are not counted).
@ -1202,29 +1203,30 @@ static void send_headers_and_exit(int responseNum)
*/
static int get_line(void)
{
int count = 0;
int count;
char c;
alarm(HEADER_READ_TIMEOUT);
count = 0;
while (1) {
if (hdr_cnt <= 0) {
hdr_cnt = safe_read(STDIN_FILENO, hdr_buf, sizeof_hdr_buf);
if (hdr_cnt <= 0)
break;
goto ret;
hdr_ptr = hdr_buf;
}
iobuf[count] = c = *hdr_ptr++;
hdr_cnt--;
c = *hdr_ptr++;
if (c == '\r')
continue;
if (c == '\n') {
iobuf[count] = '\0';
if (c == '\n')
break;
}
iobuf[count] = c;
if (count < (IOBUF_SIZE - 1)) /* check overflow */
count++;
}
ret:
iobuf[count] = '\0';
return count;
}